login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030174 Squares composed of digits {1,2,3}. 4
1, 121, 12321, 1322122321, 132233322321, 213223221121, 13223121322321, 1212111311221321, 131332121232312121, 31121322221111133211321, 3322133322121313132333322321, 12232213113321121113332133323121 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

P. De Geest, Squares containing at most three distinct digits, Index entries for related sequences

Author?, Source(txt)

Hisanori Mishima, Sporadic tridigital solutions

Eric Weisstein's World of Mathematics, Square Number.

CROSSREFS

Cf. A030175.

Sequence in context: A261570 A068117 A080162 * A180153 A178510 A066625

Adjacent sequences:  A030171 A030172 A030173 * A030175 A030176 A030177

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

EXTENSIONS

More terms from the author, Mar 15 2000.

More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 14 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 13 06:22 EDT 2020. Contains 336442 sequences. (Running on oeis4.)